Dial-lock



mc. LEwls. DIAL LOCK.

.IIPPLICICI'ION FILED MAR. 25| 1921.

Patented Nov. 29, 1921.

. 2 SHEETS-'SHEET 1.

AS /A E:

R. C. LEWIS.

DIAL LocK.

APPLICATION FILED MAR. 25, |921.

Patented Nov. 29,. l1921.

2 SHEETS-SHEET?.

UNITED sTArss JPAIENIICFFICE.

ROLLING.l LEWIS, or STM/Ironia, CONNECTICUT, AssICNoR To THE e ToWNE MANUFACTURING CCMITINY, or STANFORD, CONNECTICUT.

, DIAL-Loox.

Specification of Letters Patent.` 1

Application ined March 25, 19214.y 'serial No. 455,464'.

Tartu-whom t may concern.'

Be 1t known that I, RCLLIN C. LEWIS, a citizen of the United States, and a resident of Stamford, in the county of Fairfield andV 'skilled in the art to which it appertains toA make and use the same. I

This invention relates to an improvement Y in dial locks.

Locks of this type are sometimes attacked by first vremoving the dial, and then driving thespindle back into the lock case.. The

inner end of the spindle contacting with the Y vturne'din the` proper direction to'b'ringthe gatings in theA tumblers into alinement and also in position t'or the fence to enter said curb, orthe driving cam onthespindle contacting with the adjacent tumblers dislodges the curb together with its associated stack'of tumblers and also the driving cam onthe spindle, thus removing all. protection from the bolt mechanism, sothat the bolt can then be easily retracted from outside.

-T he object of this invention is to provide an automatic deadlock normally held in .inoperative position by the driving cam, but which, when the drivingcam has been displaced from its normal position, moves into position to deadlock the bolt or the bolt guard asthe case may'be,rand thus prevent the retraction of the bolt. Y A

In the accompanying drawing, Figure 1 is a view in section through a safe door showing the dial, spindle and lock case, the latter being broken away to show the tumbler mechanism; Fig. Q'is a view of the curb and vits attached tumblers; Fig. 3 isa view iny vertical longitudinal vsection through the lock case, showing the deadlocking lever in its'normal position .out ot contact with the j bolt; Fig. 4 is a viewin plan of the deadlocking lever, bolt and fence, theftop ofthe bolt case being removed and Figs. 5, 6, 7 and 8 are views similar to Fig. 3 of modifications.-

10 represents a safe door,`11 the dial and 12 theY spindle which connects the dial 11 with the cam 13 which drives the disk tumblers 14. Thetumblers 14 are-mounted and secured on a sleeve carried by' the curb 15 detachably secured to the lock case 16', and are actuated by dial, spindle and 'driving cam 13 the latter being secured to theV spindle 12. As the tumblers are assembled on and carried bythe curb, it follows thatA it the latter-be detached from' the lock case, or

forced rearwardly ro'mits normal position, the tumblers will be moved with it.

The lock case 16 with its tumblersv and bolt mechanism are attachedtothe inner side ofthe door, and when the'. parts are assembled as shown in Fig. 1, the driving cnam 13 *which as before explained is secured tok and carried by thespindle12, rests against' the adjacent face of the first tumbler 14 of known mannerl f l Y k- 17 is the bolt` whichv is actuated by the tence 18, and in Fig. 3`the bolt is shownas mounted at its rear end on the hub 19 of bolt case 16. I

In the operation ofthe lockthe dial is the seriesand actuatesthe latter-in the well yThe'parts as thus described may be lof the' ordinary and well known constructionsjnow 1n .common use. f

sov

As previously stated,- locks as thus conj structed, are `sometimes attacked Vfrom the 'outside by first removing the dial, and then driving or forcing the spindle and driving cam inwardly, the spindle and driving cam, acting against the tum-blers forces ofthe-curb and its tumblers and leaves the boltmechanism :tree toV be actuated romthe outside.

Y My invention as previously stated consists in a safety latch ordeadlooking device normally'heldrin inoperative position by the driving cam but which when the earn is forced rearwardly as above explained is released and moves into position to `deadlock the bolt and prevent itsretractionl :tror'nthe outside.

. In the lconstruction shown Vin Figs. 3 and y 4 the deadloeking device 19 is'in the form of a latch .pivoted `at 20 and normally resting on 'the' driving cam as shown in full lines rin Fig. 3. This latch'19 isyieldingly held against the periphery of the driving cam by the spring 21, secured'at one end in a kerf in the latch andbearing at its other end This'inward movement of Y against the inner'face Vof the lock, andis provided adjacent its free end with .ashoulden 22,- adapted-when the latch dropsl into. the dotted position Shown :Figs 3, to fall beif the driving cam 13 be forced rearwardly bythe driving in of the spindle 12, it will i pass from underthe deadlocking latch 19 and permit the latter to drop to its dead locking position and positively hold the bolt against inward movement. Y

Inv the construction shown in Fig. 5 the pivoted deadlock'ing latch 19 is curved to engage the periphery of the driving cam and is pivoted to the lock case intermediate its ends. A spring 21a yieldingly holds one free end of the curved lever against the driving cam, the latter operating'to hold the other free end out of the path of the end 25 of .the bolt 17a. If with this construction, the driving cam be forced rearwardly and thus release the deadlocking latch or lever 19a, the spring 21a will then be free to turn the latch or lever into position to deadlock the bolt.

In the construction shown in Fig. 6 the deadlocking lever 19" is in the form of a bell crank lever pivoted at 20, one arm of the bell crank being yieldinglyvheld against the ydriving vcam by the spring 21b and the free end of the other arm being in a plane below the shoulder 28a on the bolt 17h. If with this construction the driving cam be driven rearwardly and out of contact with the bell crank, the spring 21" will turn the bell crank so that the dead locking end thereof will be in the path of shoulder '23 and prevent the retraction of the bolt, the toe 19C at the shoulder of the bell crank limiting the turningvmo-vement of the latter and opera-ting to hold the dead locking end of the same in position to prevent the does not project from the lock case 16a in which it is mounted and when in locking position as shown, prevents the inner end of the bolt 27 from entering the case.. In this figure the lock case 16ak is provided with a 'bolt opening to receive the inner end of the l bolt 27, vor a bolt connected with the bolt VIAL guard 26 has been moved toa position to uncover the hole 28 in the lock-case 16a and permit the 'rear end of bolt 27 to enter the latter. The guard 26 is actuated in the same manner and by the same means as the bolts of the locks shown in the other figures, If however the tumblers and driving cam .be displaced( as previously explained, it

could readily be actuated from the outer side and thus uncover the hole 28, and to prevent such action I have providedk the deadloclring lever` or safety latch 19d. @ne arm of the lever bears against the periphery of the driving cam and is yieldingly held there by the spring 21, with its other free end adjacent the shoulder` 29 on the guard. If the driving cam be displaced so as to release lever 19d, the spring 21c will turn lever 19d on its pivot 20c and carry the free end of said lever under shoulder 29 on the guard and thus deadlock the latter in a position covering the bolt hole 28 and absolutely prevent the retraction of bolt 27. l

In the construction shown in Fig. 8 the guard 26a is pivoted at 3() to the lock case 16b and normallycloses the opening 28 through which the rear end of the bolt 27 enters. This hub of theguard is provided with teeth 31 which mesh with the teeth 32 on the hub of the fence 88,-hence ywhen the fence is free to enter the gatings `in the tumbler' and driving cam the guard will be turned up and out of the path of the bolt thus permitting the rear end of the latter. in its retracting movement to enter the lock case.` To prevent the operation of the guard in the event the driving cam should be displaced, I have provided the safety or deadloclring latch 19e which latter is pivoted at 34 with its free end'35 normally restingion the periphery of the curb 15, as shownin full lines. If however the curb be displaced, this latch drops by gravity and the end 35 thereof falls into engagement with the rear tooth 32 of the fence as shown in dotted lines in Fig. 8 and prevents the fence from being turned, and the shoulder 36 onthe safety latch'or lever 19e passesover the guard and it, together with the end 35 engaging the teeth on the fence, operate .to lock the fence and also the guard against movement, yand consequently prevents retractionof the bolt27. Y

In all the forms the safety device is nor mally supported by a part of the removable p unitvof the 'lockh'ence if the unit towit,

the curb, cam( tumbler and spindle be dislodged the safety device will operate to 'deadlock `the bolt.l

It is evident that other changes'and modications may be made for accomplishingithe same end, hence I would have it understood that I do not confine myself to details, but claim broadly a deadlocking or safety latch normally held in inoperative position, .but which upon the displacement of the driving Vcamv of the lock mechanism is moved to a position to prevent'the actuation ofthe un-` locking mechanism from the outer side of the door.

Having fully described my invention what I claim as new and desire to secure by Letters-Patent, iszf,

l. In al lock, the combination of a series of tumblers, a driving cam for le same, a fence, a Vmovable membery held in locking position by the tumblers and fence and a safety latch normally held in inoperative position by its engagement with the periphery of the driving cam,'and adapted to move to deadlock said movable member in the event the driving cam` should be forced rearwardly from its normal position.

2. In a lock, the combination vof a series of tumblers, a driving cam for the same, a fence, a movable member held in locking positionfby the tumblers and fence, and a pivoted safety latch normally held in inoperative 1position by its engagement with the periphery of the driving cam and adapted to move to a position to deadlock said movable member if the driving cam should be forced rearwardly from its normal position.

In a lock, the combination of a series of tumblers, a driving cam for the same, a

fence, a movable member held in .locking position by the 'tumblers `and fence, and a spring actuated safety latch normally held in inoperative position by its contact with the periphery of the driving cam and adapt-V ed to be moved by its spring to a position to deadlock saidV movable member by the removal of the driving cam. i

4:, In a lock, the combination of a series of tumblers, a driving cam for the same, a fence, a bolt held in projected or locking position by the fence and tumblers and a spring actuated safety latch normally held in inoperative position by the driving cam and adapted, if the driving cam should be displaced rearwardly, to move into vcontact with the bolt and deadlock the same in its projected position.

5. In a lock, the combination of a series of tumblers, a driving cam for the same, a fence, a bolt held in projected or locking position by the fence and tumblers, and a safety latch pivoted at one end and norscribing witnesses;

Vmally resting against the periphery of `the driving cam, the free end of said latch adapted to move to a position to directly engage and deadlock the bolt in the `event the driving cam should be displaced.

6. In avlock, he combinationof a series yof tumblers, a driving cam for the same, a

tion by its engagement with the driving cam,

the said latch being provided at its free-'end with a shoulder adapted to move behind a shoulder on the bolt, and withr an end projection adapted to rest on the bolt when the latch is released by the displacement of the driving cam. i

7. In a lock, the combination with a lock i case, a tumbler within 1 the lock case, :a

ber and a safety llatchnormally held in Vin:A

operative position by its engagement with i spindle, and a driving cam on the spindle, 1' v a part of, said unit and adapted to move .to deadlock said movable member in the event the part of said unit normally 'supporting the latch shouldl be forced rearwarlyfiom its normal position.

8. In a `lock,the combination of a curb,`a

series ofv tumblers carried by the curb, a driving cam for the tumblers, a spindle carrying 4said driving cam, a movable member normally'held in locking position by the tumblers, and a safety latch normally held in operative position by its engagement with the periphery of the driving cam and adapted to move toY deadlockysaid movable member `if the driving cam should be forced rearwardly from its normal position.

In testimony whereof, I have signed this specification in the presence of two subv ROLLIN C. LEWIS.

Viitnesses: JOHN II. BoDwELL, CHARLESA. BERRY. 

